HMC121G8 Datasheet, PDF (1/6 Pages) Hittite Microwave Corporation – GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz

MICROWAVE CORPORATION
HMC121G8
GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
FEBRUARY 2001
Features
General Description
WIDE BANDWIDTH: DC - 8 GHZ
LOW PHASE SHIFT VS. ATTENUATION
2 ^{30 dB ATTENUATION RANGE}
SIMPLIFIED VOLTAGE CONTROL
The HMC121G8 is an absorptive voltage
variable attenuator provided in a surface-
mount hermetic package. It features an on-
chip reference attenuator for use with an
external op-amp to provide simple single
voltage attenuation control. The device is
ideal in designs where an analog control
signal must control RF signal levels over a
30 dB amplitude range, such as in AGC
circuits and in temperature compensation of
multiple gain stages. Applications include
military ECM and communications as well
as commercial microwave radios and VSAT.
Guaranteed Performance, 50 ohm system, -55 to +85 deg C
Parameter
Min.
Typ. Max.
Insertion Loss
DC - 4 GHz:
1.5
3.0
DC - 8 GHz:
2
3.5
Attenuation Range
25
30
Return Loss
DC - 4 GHz:
10
15
DC - 8 GHz:
7
10
Switching Characteristics
tRISE, tFALL ( 10/90% RF):
3
tON, tOFF (50% CTL to 10/90% RF):
6
Input Power for 0.25dB Comp. ( 0.5 - 8GHz)
Min. Atten:
+10
Atten. > 2dB:
-2
Input Third Order Intercept (two - 8 dBm signals) Min. Atten:
+25
Atten. > 2dB:
+10
Units
dB
dB
dB
dB
dB
ns
ns
dBm
dBm
dBm
dBm
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone]
2 - 20
Fax: [phone]
Web Site: www.hittite.com